<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo.jpeg" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button></el-header
    >
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px':'200px'">
          <div class="toggle-button" @click="toggleCollapse">|||</div>
          <!-- 侧边栏菜单区域 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409BFF"
          unique-opened
          :collapse='isCollapse'
          :collapse-transition='false'
          router
          :default-active='activePath'
        >
        <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
              <!-- 一级菜单的模板区域 -->
            <template slot="title">
                <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
                <template slot="title">
                <!-- 图标 -->
              <i class="el-icon-menu"></i>
              <!-- 文本 -->
              <span>{{subItem.authName}}</span>
            </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧主体内容 -->
      <el-main>
          <!-- 路由占位符 -->
          <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
    data(){
        return {
        // 左侧菜单数据
        menuList:[],
        iconsObj: {
            '125': 'iconfont icon-user',
            '103': 'iconfont icon-tijikongjian',
            '101': 'iconfont icon-shangpin',
            '102': 'iconfont icon-danju',
            '145': 'iconfont icon-baobiao'
        },
        // 是否折叠
        isCollapse:false,
        // 被激活的链接地址
        activePath:''
        }
    },
    created(){
        this.getMenuList()
        this.activePath=window.sessionStorage.getItem('activePath')
    },
  methods: {
    logout() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    // 获取所有的菜单
    async getMenuList(){
        const {data:res} = await this.$http.get('menus')
        if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
        this.menuList =res.data
        console.log(res)
    },
    // 点击按钮切换菜单的折叠和展开
    toggleCollapse(){
        this.isCollapse=!this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath){
        window.sessionStorage.setItem('activePath',activePath)
        this.activePath=activePath
    }
  },
};
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}

.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      font-size: 15px;
    }
  }
}

.el-aside {
  background-color: #333744;
  .el-menu{
      border-right: none;
  }
}

.el-main {
  background-color: #eaedf1;
}

.iconfont{
    margin-right: 10px;
}

.toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>